ALSTOM AS111‑1 Analog Output Module

Technical Specifications

Model：AS111‑1

Brand：ALSTOM

Product Type：Analog output module

Applicable System：ALSTOM Alspa series control rack,turbine governor system

Supply Voltage：24V DC backplane power supply

Output Channel：4‑channel analog output

Signal Range：4‑20mA,0‑10V,‑10V~+10V configurable

Resolution：16‑bit

Full‑scale Accuracy：±0.1%

Isolation Voltage：1500V AC channel‑to‑backplane galvanic isolation

Communication Interface：Rack backplane internal system bus

Status Indicator：Multi‑color LED for power,channel status and module fault

Built‑in Function：Digital‑to‑analog conversion,output signal conditioning,loop diagnostic monitoring for field actuators

Working Temperature：0℃ ~ +55℃

Storage Temperature：‑20℃ ~ +70℃

Protection Class：IP20

Mounting：Plug‑in slot installation inside control rack

Weight：0.44kg

Product Brief:

AS111‑1 is legacy plug‑in analog output module for ALSTOM Alspa control rack,widely applied in steam turbine governor system. It converts digital control commands from main controller into standard analog current or voltage signals to drive hydraulic actuators,valve positioners and field regulating equipment. Each channel supports galvanic isolation to suppress field surge and common‑mode interference,improving control loop stability. Module receives power and configuration data through rack backplane bus. Front‑panel LED indicators support quick on‑site channel fault diagnosis without extra testing tools. Plug‑in cabinet mounting structure enables convenient disassembly and module replacement. This is EOL discontinued spare part for thermal power plant turbine control system maintenance and renovation. Please confirm hardware revision,signal range configuration and rack compatibility before purchase. Strict ESD anti‑static protection shall be performed during installation.